I found a solution as you can find the selected row, cast the control to 
type of Linkbutton and show it's Text property. and here is the code.


protected void Show_Name( System.Object sender, 
 System.Web.UI.WebControls.DataGridCommandEventArgs e ) { 

   int row = Convert.ToInt32(e.Item.ItemIndex);

   // in this case i click the linkbutton in the first column.
   Response.Write ("<BR>1. --->at column# " + col + " i click  " + 
((LinkButton)dg.Items[row].Cells[ 0 ].Controls[ 0 ]).Text);
}

hmm! could i kow which cell (column) i click???

Thanks


> 
> How can i know the value LinkButton.Text.
> 
> I have two linkbutton in a datagrid as below.   
> when the Show_Name executeed i Get the error 
> "System.NullReferenceException: Object reference not set to an instance 
of 
> an object." 
> 
> is this due to the cast condition or the somthingelse ???
> 
> Thank in advance for any help. The partial code below.
> 
> 
> 
>  protected void Show_Name( System.Object sender, 
> System.Web.UI.WebControls.DataGridCommandEventArgs e ) {
> 
>   
>   LinkButton myButton = (LinkButton)(e.Item.FindControl("LinkA"));
> 
>   if (myButton.Text == "LinkA"){  //**** error occur here
>  	Response.Write ("<BR>---->" + myButton.Text);}
>   else {
>  	Response.Write ("<BR>---->" + myButton.Text);};
> }
> 
> 	
> <asp:DataGrid id="dg" 
>   onItemCommand="Show_Name"
> 
> <column>
> <asp:ButtonColumn  Text="LinkA" CommandName="GotoA" 
> ButtonType="LinkButton"/>
> 
> <asp:ButtonColumn  Text="LinkB" CommandName="GOTOB" 
> ButtonType="LinkButton"/>
> </columns>
> 
> </asp:DataGrid>